Khalil Eideh is an Australian State (Victoria) Member of Parliament who was on an official trip studying drug policy and injecting rooms. When the group was to travel from Canada to the USA he was denied entry. This article says that he was denied entry but does not give any specific reason.
The article says he was granted an "Official Visa" for the trip and being a member of parliament he is only a citizen in Australia.
The are possible reasons to assume that the denial (travel bans, religion, etc) occurred that could be correct or incorrect. I would like to know the official reason